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11.
Patrick J. Leman Ana P. Macedo Annet Bluschke Louise Hudson Charlotte Rawling Hannah Wright 《The British journal of developmental psychology》2011,29(1):131-137
Gender and ethnicity are important aspects of children's everyday social relationships, yet little is known about how these social categories influence children's collaborative interactions. In the present study, 322 White (Caucasian) and South Asian boys and girls (mean age, 7.5 years) collaborated in pairs on easy and difficult versions of a model completion task. As expected, girls were less assertive than boys in conversation, yet this relation held only for all‐Asian pairs (i.e., an Asian boy and girl in conversation). Also consistent with expectations, levels of conversational affiliation were lowest in cross‐ethnic interaction. The influence of gender and ethnicity on conversations did not vary in light of contrasting cognitive demands of the tasks. Results are discussed in relation to work on effective peer collaboration and the potential role of contact in promoting positive ethnic and gender group attitudes. 相似文献
12.
The amygdala, the dorsal periaqueductal gray (dPAG), and the medial hypothalamus have long been recognized to be a neural system responsible for the generation and elaboration of unconditioned fear in the brain. It is also well known that this neural substrate is under a tonic inhibitory control exerted by GABA mechanisms. However, whereas there is a growing body of evidence to suggest that the amygdala and dPAG are also able to integrate conditioned fear, it is still unclear, however, how the distinct hypothalamic nuclei participate in fear conditioning. In this work we aimed to examine the extent to which the gabaergic mechanisms of this brain region are involved in conditioned fear using the fear-potentiated startle (FPS). Muscimol, a GABA-A receptor agonist, and semicarbazide, an inhibitor of the GABA synthesizing enzyme glutamic acid decarboxylase (GAD), were used as an enhancer and inhibitor of the GABA mechanisms, respectively. Muscimol and semicarbazide were injected into the anterior hypothalamus (AHN), the dorsomedial part of the ventromedial nucleus (VMHDM), the dorsomedial (DMH) or the dorsal premammillary (PMD) nuclei of male Wistar rats before test sessions of the fear conditioning paradigm. The injections into the DMH and PMD did not produce any significant effects on FPS. On the other hand, muscimol injections into the AHN and VMHDM caused significant reduction in FPS. These results indicate that injections of muscimol and semicarbazide into the DMH and PMD fail to change the FPS, whereas the enhancement of the GABA transmission in the AHN and VMHDM produces a reduction of the conditioned fear responses. On the other hand, the inhibition of this transmission led to an increase of this conditioned response in the AHN. Thus, whereas DMH and PMD are known to be part of the caudal-most region of the medial hypothalamic defensive system, which integrates unconditioned fear, systems mediating conditioned fear select the AHN and VMHDM nuclei that belong to the rostral-most portion of the hypothalamic defense area. Thus, distinct subsets of neurons in the hypothalamus could mediate different aspects of the defensive responses. 相似文献
13.
This article argues that Bowers and Paternoster’s emphasis on a moral community marks an important step towards a more ethical and effective approach to anti-doping. However, it also argues that the authors’ proposed strategies undermine their stated goal of effectively engaging athletes as partners in anti-doping efforts and raise ethical concerns. Their proposed emphasis on exploiting shaming as a punishment and their general view of athletes as adversaries fosters mistrust between athletes and those who enforce the anti-doping rules. Instead, this article describes a model for empowering athletes as stakeholders in anti-doping policy as a means to provide anti-doping rules with increased moral legitimacy among athletes. 相似文献
14.
Davi M. Macedo Lisa G. Smithers Rachel M. Roberts Lisa M. Jamieson 《Australian psychologist》2020,55(4):336-348